“Metal Contents and Acute Toxicity of Combined Vernonia amygdalina Leaves and Garcinia kola Seeds-VAGK, a Herbal and Nutritional Formulation in Male Wistar Rats”, AJBR, vol. 22, nº 2, p. 187–194, maio 2019, Acesso em: 21º de maio de 2026. [Online]. Disponível em: https://www.ojshostng.com/index.php/ajbr/article/view/2260